The Camphor of Kedah: What Old Tamil Maritime Loanwords Reveal About Early Southeast Asian Trade Networks

Archaeologists reconstruct past societies by examining physical remains: a layer of ash in a trench, a fragment of pottery, or a buried hearth. These physical remains form a sequence of layers, a process known as stratigraphy, which allows researchers to date findspots. Yet, in the study of early Indian Ocean commerce, another kind of stratigraphy exists. It is found in language.

When distinct cultures trade, they do not just exchange goods; they borrow words. By analyzing the layers of Old Tamil loanwords preserved in early Malay and Thai inscriptions, epigraphists—scholars who study ancient inscriptions—and linguists can reconstruct the specific botanical, mineral, and administrative commodities that moved across the Bay of Bengal. This linguistic evidence offers a dry, precise contrast to the exaggerated claims of classical literature.

The Epigraphic Layer of the Kra Isthmus

Popular narratives of ancient Indian maritime expansion often rely on classical texts that describe vast fleets and wealthy merchant kingdoms. However, field archaeology and epigraphy demand a more cautious approach. In his research on early Tamil epigraphy, scholar Emmanuel Francis has documented how actual stone inscriptions provide a far more grounded view of these historical contacts than literary legends.

On the Kra Isthmus of present-day Thailand and the Malay Peninsula, several stone inscriptions contain Old Tamil terms. One of the most significant is the Wat Maha That inscription found in Nakhon Si Thammarat in southern Thailand. Rather than recording grand political conquests, these inscriptions document everyday transactions, religious donations, and the activities of merchant guilds, such as the Manigramam (a medieval Tamil merchant guild) and the Disai-Ayirattu-Ainurruvar (the "Five Hundred of the Thousand Directions").

[West Coast of India] <--- (Spices, Textiles) ---> [Bay of Bengal] <--- (Camphor, Tin) ---> [Malay Peninsula]

These inscriptions contain specific administrative terms. For example, the Tamil term adhikari (an official or administrator) appears in Southeast Asian contexts to denote local leaders who managed trade ports. The borrowing of administrative titles suggests that Indian merchants did not simply trade from their ships; they established long-term legal and administrative frameworks alongside local Southeast Asian authorities.

The Botanical Stratigraphy of Camphor

Among the commodities traded, camphor holds a unique place in both linguistics and botany. In Tamil, camphor is known as karpuram (a loanword from Sanskrit). However, the high-quality camphor highly prized in ancient markets did not come from India. It came from the Dryobalanops aromatica tree, native to Sumatra and the Malay Peninsula. This specific variety was known as Barus camphor, named after the port of Barus on the western coast of Sumatra.

In early Malay and Old Tamil inscriptions, we see a reverse linguistic flow. While Tamil merchants brought Sanskrit-derived terms for certain ritual items to Southeast Asia, they borrowed local Austroasiatic and Austronesian terms for indigenous botanical products.

                       [Dryobalanops aromatica tree]
                                     │
                        (Extraction of raw crystals)
                                     │
                                     ▼
                      [Port of Barus, Sumatra] (Barus Camphor)
                                     │
                     (Austronesian: *kapur / Tamil: karpuram)
                                     │
                                     ▼
                        [Ports of the Tamil Coast]

The term kapur (meaning chalk or camphor in Proto-Austronesian) was adapted into Tamil as karpura-nan-cey (fine camphor lands) in temple donations, showing how deeply integrated this foreign botanical commodity became in local South Indian administrative records. The presence of these specific botanical loanwords in epigraphic records confirms that trade was highly specialized, focusing on distinct ecological products that could not be grown on the Indian subcontinent.

Tin, Gold, and the Vocabulary of Weight

Beyond botany, the mineral trade left a permanent mark on the vocabulary of early Southeast Asia. The Malay Peninsula was historically rich in tin, an essential component for making bronze. The Old Tamil term for tin, eeyam, and terms for weights and measures, such as kalanju (a gold weight measurement standard), appear in regional epigraphic records.

In his extensive studies of South Indian epigraphy and its maritime extensions, Emmanuel Francis highlights how the use of these specific units of weight in foreign ports indicates a shared standardized system of commerce. When a merchant guild donated a specific weight of gold, measured in kalanju, to a local temple in southern Thailand, it demonstrated that South Indian metrology—the science of weights and measures—was recognized and accepted by Southeast Asian harbor masters.

This linguistic borrowing was not a one-way street. The Old Malay word tahil (a unit of weight) found its way into Tamil merchant records, demonstrating that trade was a mutual negotiation.

⚖ Scholarly Debate: The Chronology of Influence

There is ongoing scholarly debate regarding the precise dating of these linguistic transfers. Some linguists argue that the earliest layers of borrowing date back to the late centuries BCE, coinciding with the introduction of rouleted ware (a type of decorated pottery) and carnelian beads in Southeast Asian archaeological sites.

Others, taking a more conservative epigraphical approach, point out that the earliest readable Tamil inscriptions in Thailand and Sumatra, such as the Lobu Tua inscription of Barus, date to the 11th century CE. They caution against projecting late medieval trading patterns into the early historical period without clear, stratified archaeological context.

What is certain is that the linguistic stratigraphy matches the physical finds. Where we find Tamil loanwords for tin and camphor in early inscriptions, we also find South Indian pottery fragments and stone touchstones used by gold merchants. The words and the shards tell the same story: one of highly organized, specialized, and balanced maritime exchange.